<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script>
    function myBrowser() {  // 获取浏览器版本
        var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
        var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器
        var isIE = userAgent.indexOf("compatible") > -1
            && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
        var isEdge = userAgent.indexOf("Edge") > -1; //判断是否IE的Edge浏览器
        var isFirefox = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器
        var isSafari = userAgent.indexOf("Safari") > -1
            && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器
        var isChrome = userAgent.indexOf("Chrome") > -1
            && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器

        if (isIE) {
            var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
            reIE.test(userAgent);
            var fIEVersion = parseFloat(RegExp["$1"]);
            if (fIEVersion == 7) {
                return "IE7";
            } else if (fIEVersion == 8) {
                return "IE8";
            } else if (fIEVersion == 9) {
                return "IE9";
            } else if (fIEVersion == 10) {
                return "IE10";
            } else if (fIEVersion == 11) {
                return "IE11";
            } else {
                return "0";
            }//IE版本过低
            return "IE";
        }
        if (isOpera) {
            return "Opera";
        }
        if (isEdge) {
            return "Edge";
        }
        if (isFirefox) {
            return "Firefox";
        }
        if (isSafari) {
            return "Safari";
        }
        if (isChrome) {
            return "Chrome";
        }
    }
</script>
</html>